ClixSense, a website that claims to pay users for viewing advertisements and completing online surveys, is the latest victim to join the list of "Mega-Breaches" revealed in recent months, including LinkedIn, MySpace, VK.com, Tumblr, and Dropbox.

More than 2.2 Million people have already had their personal and sensitive data posted to PasteBin over the weekend. The hackers who dumped the data has put another 4.4 Million accounts up for sale.In addition to un-hashed passwords and email addresses, the dump database includes first and last names, dates of birth, sex, home addresses, IP addresses, payment histories, and other banking details of Millions of users.

Troy Hunt, operator of Have I Been Pwned? breach notification service, verified the authenticity of the data taken from ClixSense.Besides giving away 4.4 Million accounts to the highest bidder, the hackers are also offering social security numbers of compromised users, along with the complete source code of the ClixSense website and "70,000 emails" from the company's internal email server, according to a Pastebin message advertising the stolen database.

ClixSense admitted the data breach and said some unknown hackers were able to get access to its main database through an old server which the firm was no longer using, but at the time, still networked to its main database server.After gaining access, the hacker was able "to copy most, if not all" of the ClixSense users table, ran SQL code to change account names to "hacked account," deleted several forum posts, as well as set account balances of users to $0.00.

ClixSense owner Jim Grago admitted that the database contained entries for roughly 6.6 Million accounts and that the company became aware of the breach on September 4 and managed to regain control of their DNS over the weekend. Users are strongly advised to change their passwords for ClixSence account immediately, and it would also be a good idea to reset passwords for all of your other online services, especially those using the same passwords.Since ClixSense uses a large trove of personal information on its users, make sure you change your security questions, if it uses any of the information you provided to ClixSense, such as your address, date of birth, or other identifying information.